Mixer



K. ADAMS Nov. 4, 1930'.

MIXER Original Filed April 12, 1928 1 NVENTOR flem ozon fldams' IATTORNEYS Patented Nov. 4, 1930 UNITED STATES KEMPTON ADAMS, OF BEDDINGRIDGE, CONNECTICUT MIXER' Application filed April 12, 1928, Serial Nd.269,406. Renewed September 6, i929.

This invention relates tonew and useful improvements in mixers. I

Its object is to provide'a simple and eificient apparatus for mixingdifferent materials; such as the ingredients of concrete.

The modern tendency in concrete practice is '-to use a stiff mix, andthe result is that the mixers now available arenot well suited topresent requirements. With former apparatus the thorough interminglingof the ingredients of a comparatively dry concrete is aslow; and tediousprocess. It has been found that better results can beobtainedby'manually working the materials together.

One of the specific objects of the present invention is'to provide apower driven machine in which the ingredients are stirred and workedthoroughly and rapidly in the desired consistency. 20 Anotherobject isto provide an arrangemerit for quickly and positively discharging themixed materials fromthe apparatus. I

These and other objects of-the invention .will appear in the followingspecification.

In-the drawings, Fig. 1 is an elevation,

partly in sectiorn'of a machine which embodies this invention; 7

I I Fig. 2 is a plan view of the same apparatus;

and 1 l i Fig. 3'is a fragmentary sectional elevation of one of theparts of the apparatus shown "in the preceding figures. I

' This apparatus comprises a supporting frame having an annularhorizontal portion "10 in which aresupporteda series of rollers "11mounted to turn'freely about horizontal "axes, and another'seriesof'rollers 12'which turn about vertical axes.

120 isa frusto-conical shell having near its upper; end a rim 21. Thisrim is constructed to form a smooth" track 22 which rests upon therollers 11 and a-fiange 23 which bears against the rollers 12. 111 113are mounted two series-of rollers 24 and 25, the purpose of 5 whichwillappearlater. 26 is agear member on the shell by means of whichtheshell and its connected parts are rotated. Tothe lower endof theshell 20 is affixed '3. bottom ring 30 which-carries a pivoted closureplate 31 which is held in closed farther up. e The machine isdriven-from a power shaft 50, keyed to whichare gears 51 and 52 whichposition by a bolt 32. This member com prises a central post 33connected to the ring by spider arms 34. On the post 33 are propellerblades which are disposed and constructed to forman interrupted doublethread-screw of high pitch.

40 is a ring which rests on rollers 24 and bears against rollers 25. Toit is affixed a ring gear 41 and an annular member 42. Af-. fixed to thelatter are arms 43 which extend down into the shell 20 and are paralleltherewith. These arms'are triangular in cross section, as shown at 44 inFig. 2, and their lower ends are affixed to a ring 45. On these arms arevanes 46 which are angularly disposed as shown. The lower ends 47 ofthese vanes are curved to form scrapers and their upper portions aretwisted as at 48. The vanes nearer the bottom of the cone are shorterthan those are longitudinally slidable together by means of a bell cranklever 53. 54 is a countershaft which is connected to drive shell 20 inone direction through bevel gears 55 and a gear 56 which meshes with theannular gear member 26, and to drive'the member'42 and its arms 43 inthe opposite direction through gear 57 which is in mesh with the'ringgear 41. When gear 51 is in the position shown'in Fig. 1, it drives thegear 58 on the-counter shaft 54. Gear 52 can be moved down to engagegears 59 to drive the countershaft. in the opposite direction. V

The operation of this apparatus willnow be'described. f Y

Desired materials are put into the shell 20 I and the latter with itspost 33 and the blades 35 is rotated in an anti-clockwise direction; Theblades passing through the mass within the shell tend to raise it andthrow'it outwardly toward the inner moving surface of the shell. Thematerial obviously Will run down and will be rotated to some extent byits contact with the shell. At the same time the arms 43 are rotating inthe opposite direction. The forward edges of these arms and the forwardends 47 of the vanes 46 scrape the material from the surface of theshell and as these vanes move through the mass they move it inwardly andupwardly and at the same time turn it over. Thus the materials aremostthoroughly agitated and stirred and become completely intermixed in avery short time.

A great advantage of this apparatusis that even with such materials asthose of a comparatively stiff concrete mix, it can be run at muchhigher speeds than are effective with former machinesui 7 Now when themixing operation is com:

' pleted, the closure plate 31 is released and swung back into theposition iniwhich it is shown at 31A in Fig." land held there by a"latch 36/ The mechanism is now reversed by means of a lever 53.,Thejblades 35 and the vanes 46 Will now drive the mixed mate- .rialsdownwardly so that it will be discharged more rapidly and morecompletely than if it were permitted to drop out by the action ofgravity alone. 7. v s

The apparatus described is shownwmore or less diagrammatically and isintended only toillustrate "the principle disclosed herein, as manymodifications of'structure are possible without departing from thespirit and scope of the inventionas defined in the following claims. v

What I claim is v V1. A .mixer comprising a receptacle arranged toberotatedabout a'substantially vertical axis, means therein for movingmaterial upwardly and outwardly, and other means therein for movingmaterial inwardly and turning it over. I 1

1 m 2.'A mixer comprlsing a receptacle arranged to. be rotated about a.substantially kt/Alniixer' comprising afrusto-conical vertical axis, aremovable bottom therefor, a plurality 'ofpropeller blades within therer V ceptacle and rotatable therewith for moving material, and means forreversing the direction of *rotationofthe receptacle and the receptacleandthe bladesand of saidvanes.

shell arranged tobe rotated about sub- 1 stantially vertical axis, andmeans disposed centrally thereof and supported from above 7 or movingmaterialupwardly and outwarde o u 5. "A mixer comprising afrusto-conical shell arranged to be rotated about a substan- V tiallyvertical axis and having an upwardly and outwardly tapered 'materialsupporting surface, means disposed centrally thereof the shell formoving material inwardly.

6. A mixer comprising a frustoaconical shell arranged to be rotatedabout a substantially vertical axis, means disposed centrally thereoffor moving material upwardly and outwardly, and othermeans near theinner surface of the shell for moving material inwardly and turning itover.

7. A mixer' comprising a frusto-conical shell arrangedto be rotatedabout a substan tially verticala'xis, means disposed centrallythereof'and rotatable therewith for moving material upwardly andoutwardly, and other means near. the .inner' surface of the shell 7 formoving material upwardly and ,outwardly, and other means near the innersurface of and rotatable in the opposite direction for moving materialinwardly.

r 8. A mixer comprising a .frusto-con cal shellarranged to be rotatedabout a substantially. vertical axis, and a plurality of vanes rotatablein the oppositedi fection near the inner surface of said shell.

9. A mixer comprising a frusto-conical shell arranged to be rotatedabout a substan-r tially vertical axis,and a plurality of twisted :vanesrotatable in the opposite direction near the inner surface of saidshell, said; vanes being arranged to lift the material and turn itoveryV r ;10.: A .mixer comprising a frusto-Vconical shell arranged to berotated about a substan tially vertical axis, means disposed centrallythereof for moving material upwardly and outwardly, and a stirringmechanism rotat-v ablein the opposite" direction near the'inner surfaceof saidshell arrangedto move material upwardly and inwardly and to: turnover. c

11. A mixer comprisinga frusto-conical shell arranged to be rotatedabouta substantially vertical axis, a removable bottom therefor, aplurality of propeller blades disposed centrally within the shell androtatabletherewith for moving material upwardly andout- Wardly, and astirring mechanism rotatable in the opposite direction near'the innersurface of said shell arranged to lift the material and turn it over. 17

l2. A'mixer comprising afrusto-conical' shell arrangedto be rotatedabout a substan- V tially vertical axis, aremovablebottomtherefor, aplurality of spaced propeller blades disposedcentrally within the shelland rotat- I able therewith for moving material upwardly and outwardly,and arzstirring mechanism comprising a plurality of; spaced" twistedvanes rotatable in the opposite direction near the innersurface of saidshell arranged to lift the material and turn itover. 1 13. A mixercomprising a frusto-conical shell arranged to be rotatedabout'a'substan- 7 tially verticalaxis, aremovable bottom'therefor, aplurality of spaced propeller blades disposed centrally within the shellandrotatable therewith for moving material upwardly and outwardly, astirring mechanism comprising a plurality of spaced twisted vanesrotatable in the opposite direction near the inner surface of said shellarranged to lift the material and turn it over, and means for reversingthe directions of rotation of the shell and propeller blades and of saidstirring.

mechanism.

14. A mixer comprising a receptacle, means therein for moving materialupwardly and outwardly, and positively actuated means movableindependently of said first named means for moving material inwardly andturning it over. a p

15. A mixer comprising a receptacle, means therein for moving materialupwardly and outwardly, and positively actuated twisted means movableindependently of said first named means for moving material inwardly andturning it over.

16. A mixer comprising a receptacle, means disposed centrally thereinfor moving material upwardly and outwardly, and other means within thereceptacle for moving the material inwardly and turning it over.

17. A mixer comprising a receptacle, means disposed centrally thereinfor moving material upwardly and outwardly, and other means within thereceptacle and disposed near the inner surface thereof for moving thematerial inwardly and turning it over,

18. A mixer comprising a frusto-conical shell, rotatable means disposedcentrally thereof for moving material upwardly and outwardly, and astirring mechanism rotatable in the opposite direction near the innersurface of said shell arranged to move material upwardly and inwardlyand turn it s over.

In witness whereof, I have hereunto set my hand this 10th day of April,1928.

KEMPTON ADAMS.-

